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Clinical features

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

Clinical features of hypercapnia include:

  • drowsiness
  • flapping tremor
  • warm peripheries
  • headache
  • confusion progressing to coma and death

There may also be a bounding pulse, peripheral vasodilation (warm, sweaty extremities, infection of the eyes), muscle-twitching, and raised intracranial pressure (with papilloedema).


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